978214451 has 2 divisors, whose sum is σ = 978214452. Its totient is φ = 978214450.

The previous prime is 978214427. The next prime is 978214453. The reversal of 978214451 is 154412879.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978214451 is a prime.

Together with 978214453, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 978214399 and 978214408.

It is not a weakly prime, because it can be changed into another prime (978214453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489107225 + 489107226.

It is an arithmetic number, because the mean of its divisors is an integer number (489107226).

Almost surely, 2^978214451 is an apocalyptic number.

978214451 is a deficient number, since it is larger than the sum of its proper divisors (1).

978214451 is an equidigital number, since it uses as much as digits as its factorization.

978214451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 41.

The square root of 978214451 is about 31276.4200476973. The cubic root of 978214451 is about 992.6847682028.

The spelling of 978214451 in words is "nine hundred seventy-eight million, two hundred fourteen thousand, four hundred fifty-one".